Improvement in stove-door knobs



-'UNI'I'ED STATES PATENT Onrron.

HENRY A. TWEED, OF BROOKLYN, NEW YORK.

IMPROVEMENT lN STOVE-DOOR KNOBS.

Specification forming part of Letters Patent No. 210,065, dated November19, 1878; application filed March 4, 1878.

To all whom it may concern Be known that I, HENRY A. TWEED, of the cityof Brooklyn, county of Kings, and State of New York, have invented a newand useful Improvement in Stove-Door Knobs, of which the following is afull, true, and exact description, reference being had to theaccompanying drawings.

My invention relates to an improvement in knobs for the doors of stoves,or other doors subjected to great heat; and it consists in a convenientmode of clamping a' non-combustible insulating material between twostronger metallic bearing-surfaces.

I am aware that stove-door knobs have before now been patented, amongothers one to Miles W. Gardner, October 11, 1875, No. 168,7 34; but myknob differs from his in the fact that I use a non combustibleinsulating material between the clamping portions of the knob, whileGardner uses a wood insulator, which is quickly destroyed by the heat ofthe fire and becomes inoperative.

My invention will be clearly seen in the accompanying drawings, inwhich- Figure 1 represents a perspective view of my improved knob; Fig.2, a cross-section of the same.

D represents the bolt of the knob, provided at one end with abutton orhead, F. Surrounding the bolt D, and bearing against the head F, is thecup-shaped metallic piece O. The corresponding cup-shaped metallic pieceB is screwed upon a screw-thread, S, by means of the screw-thread E cutthrough its base. I

- The cup 0 need not be used, and the fingerpiece A might rest againstthe knob F instead.

in g non-combustible, is also much more durable and cleanly than that ofwood.

Ido notclaim, broadly, an insulatin g material clamped between twometallic cups; but

I do claim and desire to secure by Letters Patent My improved knob,which consists of a metallic cup, 0, bearing against a bolt, D, aninsulating non-combustible finger-piece, A, and clamp B, provided with ascrew-thread, E, screwing on the spindle D, substantially as described.

HENRY A. TWEED. Witnesses S. F. SULLIVAN, WM. J. SAWYER.

